Last week, singer/actress Mandy Moore addressed this worldwide problem by urging Congress to act swiftly to solve this problem.

An ambassador of child survival organisation Population Services International, Moore attended the inaugural USAID Frontiers in Development forum Monday and co-hosted a briefing the following day called The Ripple Effect of Water, Sanitation and Hygiene on Global Health and Development. During the briefing, Moore discussed her experiences in the Sudan meeting impoverished Sudanese people who have become very ill from drinking contaminated water.

Of the experience, she told the crowd, “One out of six lacks safe drinking water.” During the three-day event, Moore also met with world leaders and government officials to stress the importance of taking swift action.

Here’s hoping Moore’s work helps engender the life-saving changes needed in the Sudan and across the globe.